Co Op Missions // cannot establish connection

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What miracle am I supposed to perform, in order to either host a server or join one? All ports are free, firewalls permissions are good but my brother and I are not able to establish a connection to any coop server. It always gets us this error message #10019 coonection to server couldnt be established <- I tried to translate this into english #10019 Die Verbindung zumSpieleserver konnte nicht hergestellt werden

We are clueless..anyone managed to establish a connection?

Cheers

Jimmy

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Yes please I agree with Jimmy and further there are no instructions on how to properly set up, host or join a coop server. Please provide this to your users, we have tried and get the same message connection to server could not be established.

Looking forward to hearing solutions to this issue.

S~

SEOWHQ_Badger

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Same problem here. I've just purchased two copies of BoS so I can play it multiplayer on my Lan and although i can happily join servers hosted on the internet from both PC's when I try to host my own server on one PC and join on the other I get the same message #10019connection to server could not be established. If someone knows the answer the this it would be greatly appreciated.

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I finally got it working!. I'd mailed support a few times and got no help at all and the I'd already opened the firewall ports (28000 TCP/UDP, 28100 TCP/UDP, 80 TCP , 443 TCP ) and even tried it with the firewall off on both PCs and adding the PC acting as the server to the DMZ which made no difference. What did make a difference was in the settings for multiplayer adding the specific IP address of that is used to connect to my Lan. My PC runs VMware so has several IPs on different virtual interfaces.

My next issue after being able to actually join a game was immediately getting kicked out with a #10009 error. Again I figured this out by myself with a bit of guesswork and this was fixed by again going into multiplayer settings and changing the bandwidth allowed up from the default 1Mb/s up to the max of 10Mb/s for both sending and receiving. I did this on both server and client and hey presto I can finally have a local multiplayer session on my Lan. What would have been useful is having this info in an FAQ as it would have saved my hours of frustration. The PDF multiplayer guide for example is out of date as it states to fix the problem you need to download a and run a dedicated server and this is no longer the case.

At least I got there in the end

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I finally got it working!. I'd mailed support a few times and got no help at all and the I'd already opened the firewall ports (28000 TCP/UDP, 28100 TCP/UDP, 80 TCP , 443 TCP ) and even tried it with the firewall off on both PCs and adding the PC acting as the server to the DMZ which made no difference. What did make a difference was in the settings for multiplayer adding the specific IP address of that is used to connect to my Lan. My PC runs VMware so has several IPs on different virtual interfaces.

My next issue after being able to actually join a game was immediately getting kicked out with a #10009 error. Again I figured this out by myself with a bit of guesswork and this was fixed by again going into multiplayer settings and changing the bandwidth allowed up from the default 1Mb/s up to the max of 10Mb/s for both sending and receiving. I did this on both server and client and hey presto I can finally have a local multiplayer session on my Lan. What would have been useful is having this info in an FAQ as it would have saved my hours of frustration. The PDF multiplayer guide for example is out of date as it states to fix the problem you need to download a and run a dedicated server and this is no longer the case.

At least I got there in the end

You're more successful than I. I, for a still unknown reason to me, still can't get my ports opened properly via router and modem.

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Are you successful guys going through your PC and not using Dserver? I am having a Dserver issue where all files, etc. are where they should be (Coop folder), but when running Dserver on another PC (I don't want to mess up my flying PC if it gets hacked), it still drops the mission into Dogfight, and doesn't work. I can spectate, but that's it. Any ideas on actually how to use this mode?

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If you opened the ports in your router/modem, then it could be that your router/modem is actually behind your ISP modem and that one is blocking the ports. I had this issue with mine and had to get VPN to host my coop mission.

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If you opened the ports in your router/modem, then it could be that your router/modem is actually behind your ISP modem and that one is blocking the ports. I had this issue with mine and had to get VPN to host my coop mission.

Thanks for that- will have to try a VPN. I use a mobile 4G Wi-Fi adapter so am not able to access ports from the computer as far as I know how.

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After working on CO-OP missions I finally wanted to actually play one with a friend... ended up here for obvious reasons. Opened ports (yeah that was a whole...thing) and checked with the port checker utility mentioned above.

We do need a pinned guide on here and steam for people who are not tech savvy though.

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It’s the first line of defense and hides all devices connected to your network from attackers. That’s why we open specific only ports, without the firewall all ports are open!

If you are uncertain for your port forwarding check here: https://portforward.com/router.htm for instructions on your routers port fowarding. Maybe you won’t find the exact type of yours but usually the same company routers have very similar menus.

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if it isnt working contact your isp. I had everything setup correctly for months and was pulling my hair out, called the isp and those dingleberries were blocking port forwarding. Rural America ISPs, terrible.

Edited April 9, 2018 by banzaii

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I have an issue too!, when I create a cooperative mission with the test mission provided by the developers, my crew can join the cooperative server without issues, but then when we try to load a mission (even one that we made with very simple things, like a practice academy) it doesn't allow anyone except me (the host) to join, it gives a "File Transfer Error", We tried making everyone download the mission and place it on the correct folder but we still get the same issue.

I have all the relevant ports open, since they are able to connect to the trial mission, but for personal missions or even downloaded missions, it is not possible!

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I've got IPv6 - port forwarding doesn't work withit (Vodafone cable germany) I would have to set the cable modem into "bridge mode" and connect another normal router to it to prepare the port opening there.....

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Yes, my friend could always see my servers and others. I could and can join my and others servers, normal or coop. But apparently nobody else could enter mine. Error message #10019 or something like that.

I'm pretty fed up with the whole situation right now.

Edited January 5 by Thad

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Yes, my friend could always see my servers and others. I could and can join my and others servers, normal or coop. But apparently nobody else could enter mine. Error message #10019 or something like that.

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I have done this on my router and in the game settings. The ports are still reported as not opened by test software. I am at a loss as to what to do.

I can connect to other IL2 servers and their files download to my computer fine. I simply can't figure out how to host any server.

Is this one of those situations where your ISP is blocking port forwarding?

I'm around on Sunday late morning and evening if you want some help troubleshooting. Mind you, I'm am definitely not the network guru; I only documented the standard setup, which, luckily, worked for me. The port forwarding business seems to be a nightmare.

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I check with my ISP and they do not block general port forwarding. There are ports that they do block, but they are listed and don't apply to IL2.

What is very confusing it the fact that I can login to others servers and their files download to my computer. Logically, the needed ports for a server connection and for file downloading and play are working. 🙁

Still, I have had no success in hosting anything.

I'm having a coop test with a friend at noon today. Server name: Thad.

If you have the time, try to connect. If it doesn't work, I will just give up and wait for a better option from the developers.

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I check with my ISP and they do not block general port forwarding. There are ports that they do block, but they are listed and don't apply to IL2.

What is very confusing it the fact that I can login to others servers and their files download to my computer. Logically, the needed ports for a server connection and for file downloading and play are working. 🙁

Still, I have had no success in hosting anything.

I'm having a coop test with a friend at noon today. Server name: Thad.

If you have the time, try to connect. If it doesn't work, I will just give up and wait for a better option from the developers.

I'll give it a try at noon. I'll be on TeamSpeak then if you need to discuss anything.